Term dissaving Definition: Negative saving during a given period of time in which consumption expenditures exceed disposable income. Dissaving is made possible by spending past or future disposable income on current consumption, that is, using income saved from previous periods or borrowing income to be earned in future periods. Saving is generally illustrated by the vertical difference when between the consumption line and the 45-degree line. Dissaving results when the 45-degree line lies above the consumption line.